20550153104561 has 2 divisors, whose sum is σ = 20550153104562. Its totient is φ = 20550153104560.

The previous prime is 20550153104497. The next prime is 20550153104617. The reversal of 20550153104561 is 16540135105502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19316596354225 + 1233556750336 = 4395065^2 + 1110656^2 .

It is a cyclic number.

It is not a de Polignac number, because 20550153104561 - 2⁶ = 20550153104497 is a prime.

It is not a weakly prime, because it can be changed into another prime (20550153101561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10275076552280 + 10275076552281.

It is an arithmetic number, because the mean of its divisors is an integer number (10275076552281).

Almost surely, 2^{20550153104561} is an apocalyptic number.

It is an amenable number.

20550153104561 is a deficient number, since it is larger than the sum of its proper divisors (1).

20550153104561 is an equidigital number, since it uses as much as digits as its factorization.

20550153104561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 20550153104561 in words is "twenty trillion, five hundred fifty billion, one hundred fifty-three million, one hundred four thousand, five hundred sixty-one".